A glitch is something that goes wrong in a computer system, usually in games. This is also sometimes called a "bug". Sometimes when a glitch happens on a computer, a message appears, telling the user that something went wrong.

Pokémon Red, Blueand Yellow - One of the most famous glitches in the history of video games. By taking advantage of the hexadecimal system of the games and the save function, the player can find a level 7 Mew by battling certain trainers and traveling to certain towns in a certain order. This glitch has become very famous in the online community. There is also the Missingno glitch, which is also famous, but will block the ability to save.

Soul Calibur III - Some things saved on a memory will get lost usually because everything a player gets is from the "Chronicles of the Sword" mode.

Call of Duty: Black Ops In the "Zombie Mode" on the map "Kino Der Toten", there is a glitch where, if you stand behind a certain wall, the "hellhounds will not attack. also, you can jump onto a podium where you are invincible.You can also jump out of the Pack-A-Punch Room in Kino Der Toten, yet it may take a few attempts. In "Multiplayer", there are glitches for getting out of maps, pr being in walls.